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Raw Bauxite Sample Unit Machinery

Jaw crusher for coal sample beautyskin.in. Abutment In coal mining 1 the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides which act as abutments of the arch of strata spanning the roadway; and 2 the weight of the rocks over a longwall face is transferred to the front abutment that is the solid coal ahead of the face and the back

HeNan MINING Heavy Industries Co., Ltd.

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